Can a person with good painting and sketching skills who is not so good with the Adobe suite become a graphic designer?

30 years ago there was no photoshop but great graphic designers and great designs/logos/ posters were still there, so yeah, you can be a great graphic designer even today without digital work. Ai/PS is just a tool, Design is about ideas which needs a good brain first. if you just know the tool but don’t have ideas we call such people operators and not designers.